Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6ecd6757fab3b42960f389513b9659bbec03a2dff30e424a2bddc4288930529d' 
  AND token = 'MEQ/ZaNUaGMFMmVnHXxlmlcEU1pZulgbYaYU7B1iBmE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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