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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '9076d624857359431f2c3c7aaeba54f58a19a17c534101f3112d3ee2c3155432' 
  AND token = '1ckFJ3C7StJrbzgseeYI6gTicJiD1AsYtRn6lUBLIek=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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