Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d60fdf427ecf14b5b1105abff86ae5d2209505306dcea0eb07f1e501524473c' 
  AND token = 'PN0JzQpz6dc77Tl/qMRmzQkLmta6u2JBRXP+h0EHa6c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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