Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '507ef150b572139b6f0a59a713d05285657b40677aefb61bef3976a7e9cf40fe' 
  AND token = 'FTDdY2zmKnE3xEMNkfc9HNzJkg5SEbYAhKAWwNt5uzc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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