Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c7bb3d506d1309c286766df98976a257d1f23dd6840053408a57a2d19c6aabb9' 
  AND token = 'O1/tYrfJ0hkHe4a2GdpzO7dOfwKMkQnQPYA9xMUBo6w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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