Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f726bad94c936d07de837255e2a17ddfc3f3609e8bc08ab78304d648518aae9' 
  AND token = 'WDiVSNVGuIQNhqCbpsRoO2ApIRrdbAFwhDLjqk+VIxM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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