Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cb71ffe0a5c8c7897a33eea02122ffc9741d50da2614bf9095db787535c749b9' 
  AND token = 'Ctze4HtN9T6HR8tKwYtKhiEM9VX6tSmuO0/wwQr3GQw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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