Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4930984b6d8b7259008f352f3d2e9f686c25b42c07216b84f8dd1e05ae0f9d68' 
  AND token = '4vhRwJTn9IXw1Z+R4WOOvEdKm8A8h1g81omrlw2akFo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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