Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '056c8e380b54a63c64526aa6b2e72c921ee47036edb9a540aab705ba2f974e36' 
  AND token = 'M0AHzQ9m8Uxz8y7vobRfBG+reySATptOW88HivR0uRY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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