Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '070adf65d62f5d45d8dc145a06d9674451bd46e00d0938a115a6d8fcd0fa4f49' 
  AND token = 'hn+BY4Nw9ek3pxhcQ2127MotA84nT6A2Afp9FcNpMsI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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