Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce6d0623bb64767cfc8358da9241ea4498ada3967383fd1a2b011900c55db90b' 
  AND token = '8yHORY2rqKwt9kAQXwhZ7gzuas5goKfM60PahNq3NyQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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