Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34bf8c25e2be93827753bf0a493d3f3c9544637b538501d91573c24285517c94' 
  AND token = 'z5AeTkAm43S4n/XFWS0ekGS1uQxMPdsZJt2la79B2jI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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