Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ada6e0f4ad32989c03ac11d4b22c57710c258a9ed754f343acae4384b49ef3b' 
  AND token = '5zhJmmXVq9kW7j4ND2soRsi31JjalsHhurGWtprhHvs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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