Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f0bff62c045b4da18fcec15c852fc3e24287db6ac6376f5bbb13768c0ab2e8f0' 
  AND token = 'PnVVPod37a9e4QcC5pS4UqKtq/HV+94ZVbdeFv0nF04=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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