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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '03c16eaff9836a4bab4003c29aba1c2ed2ad7f7d4918661cb72fa8f0590106d4' 
  AND token = 'PTqdbsEIRD2opDGs8kYy/0TPp+quSaURSLestfvZuco=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}