Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00314b77ae008c8b18ea96997bec5ac8f6aba5af4400103ccbfbd50883f7367a' 
  AND token = 'qNxZtT7GZr8wZ0fs/8Xeb5MG9rE21UzgaLIMTVa4e90=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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