Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9d6c4bb94649b7bfbce95161bde73ca4fe300b87a3d1bd093216a0e0fe593439' 
  AND token = 'SiLxMArmZ27p8I/weo3GwIlAQYvc5r20TJ32c7IGx9w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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