Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f21501574abdcd5bea854f6c419e6a79a7b90e8ebd7b9ed29a002cada11f252b' 
  AND token = 'Qp9QdAoidFUCr0pONckx/JJkBXmxce+NSxm5Sjh0N9E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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