Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8a3ef5bacafadda5087515db08ee0353af025c0697b4806d433aeed6fc983cbb' 
  AND token = 'w6qR1y7dLoAJQYbb2F/ByreCgyOwEbi/7zT7zx0Tcmg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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