Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8742deda296cbdbeb774ec91ad1cab1d22da05830b1c14ec3efe6a467402f4d5' 
  AND token = 'SKFfuDNm1ym49hGRyAs6LlvHrngWHXWJ10N7bU0Vl3k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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