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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '93bdb0e07deaa34aff382efc04a8cd6b773bf7c02f3e2a2f60f6dca89bbeb33e' 
  AND token = '+nBBVxgu3W6ld8prAXX0WHaHIWLzizMOkYghV1iD+pI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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