SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c3f97203152a5cf375155ec1d2409ab988df27e21b2205ea257ec1c412764fbe' 
  AND token = '6xKUrhjgoyEnLjBCZRCFMQKjrWeOBrGUvX8L7TRq5uI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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