Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c9ae867151113f8a66b799341cfafc45bb67315b26fde05caa27924f326cc335' 
  AND token = 'mIKs9hOFsYUGrXA+K0moOETJvU6OQfEhII5Q0YEh/20=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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