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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fac2a73c717dd27f75bbafc055ddcc3f2314bde5109176ea3f5ea7cedaa65895' 
  AND token = 'YmV/h3y+Nki/M1X+cVmZsGECmCj88w7tJzumeAVoTY8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}