Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '01fa1f18af8df6b9d790ca3314abffb0bb38e56f810383ec4bf8edf760af576a' 
  AND token = 'yzLz4uadzd7Y+vBQms+QPPN8PslgUpf6Dde5gWTLs18=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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