Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'efa7a2a36e4bcea5e42214e11cf16b6159802482affa3031a0e180a39d8a86c7' 
  AND token = 'MmRR1iChlg+d8Ex3CzHt5r2qs0vGVm289rs3Sdqle60=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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