Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2c449ac5964fc14e8ffff9c04f95613d3bd22342cdaac1e7940740f98b947fa' 
  AND token = 'RHnKFmIVscSOxyzYb2C4EkNfb1yy1UOyqoBjFaJOLdE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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