Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1a581a9b92754b9703e6f2eda85fe37cca9d4cc922ee0a75d587ba0553bba465' 
  AND token = 'q4VOOhUcz1HaItqQZbF/XBSUIJAfANt23nrP2tCne0c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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