Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b7277a843ca62383c0984f13a58bd43a8bf45442bd91a40ac4fa0ec2717ce1a1' 
  AND token = '/zIEWHf+9nROx9CRMb9xpp69eIIKBeDNZkru6GHcQ/c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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