Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '979ba6365207cf6e80cf34f5efe2ff16173196af4f2de9ef3e744f0d30312974' 
  AND token = '95bXafIx8f894ntlc4OoO1zgdPhYs02hnGvtE/hEAEI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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