Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c088756c9b0123035dcea159ef06b92246867a4c910499ad763f4af2bfb55c8' 
  AND token = 'fTSixBWcDAPr3+8/HeZky1rwwy42p/hy+Xw51LcbZmI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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