Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3c58d4a631a029b683969e3e1949f5460a6f3c92466b45441506ecc19a691aaa' 
  AND token = 'TmmTDmI+xUgfMrZmIbjDkMLXgNAQfkcte1bSdTgTJ3o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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