Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f6f005dfa880688c570c242138d698c39511b8520a80231b016250958a111215' 
  AND token = 'kdxU+76iTQZLMoF0byBVDgyl75kR1R/xUnrbkngN8z8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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