Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0e9b4dfb2e4e6d44db58391dbdd4e8eb00e26ee4dc4baf8dc3270dff1ff7c875' 
  AND token = '7o7pOTmS0wGBvXGtt2vDFY/YZfQ1tMifB1Srv8BqhrE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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