Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd8caf2e5bb5e965758c0e42f80ff6f81b34e9037a94475355073212f116c382c' 
  AND token = 'hSP5BrfMVx1Bj6kNwMjmch8Ess/jByUFdyWkcnfoKZ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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