Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '970fe91694817b4f873fcb2dbc20aea28212addcf5611c7fcbdd4b3e34a15928' 
  AND token = '2A+XvNe8SwmsehihQXyl8MKdirxyGrg5SrHcXmIcGT8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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