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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '3fad0318fb1688efe4ac75841e40dbce658bd7c2d50c7321b39779c3aeb084c0' 
  AND token = 'jPLFXfWbPsk1hP8YA2nrDBc5ttZXb2q39s38VrA1BlE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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