Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a98f08814e67ccc230a2748c26bc1928cdab9ec2d55a580062ce6aa7881310fb' 
  AND token = 'jSwQ6tRKN0KcbMhXkRHBM9cRLfoewCAAXs4vCb57z8g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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