Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c2ccbd81e1a189d290164bb2b216f1359a47c47290b606ced38abed627443c49' 
  AND token = 'jmOjZzXxgSo9652KXjzkiEC9hcr3CHkT57Qcrme3Z7o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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