Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a17e07244d3d6432ee762f6a5bd6bfca6cfeb48d5f739b0b8446d20403b7931f' 
  AND token = 'LxSoKL8ppzINL6eEvo2o4aHfBUEJzSG6yMgCF2JqRE0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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