Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b17bf174a0b1e43f21b528e38b157358c1ae42d999948a3b2620e9b5f347cd44' 
  AND token = 'KB9cu5bcgXu8N5F7ZzFBbvre7vHORCuZobMOBZNGun8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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