Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fde2ba383d550179b55aa3ecf0af13d9879af1d9da3a0111d3c4f219222f62a9' 
  AND token = '0Vx+1eU37vCCuhFrWMB2rEsqM8OTMfQFcQdJzXHu5NI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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