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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f119da533030e7cdc439120595e7c353c03c4323b749f2682540f75de7c4954' 
  AND token = 'L7B8bFq7OwKkEv7Q/JoTDI6O+Gc0LIbSlQQS6+8u81Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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