Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '171c3f5be0cd12693431c0d0e31da2118dca4875caef8c1ef17f6e086a602889' 
  AND token = 'QX9hkFJmkSkY108uRHUNuvvu2nMXkE+ah4Nve0X1k3k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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