Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a0c7be89104ef139ba4325e3b905720019111facde8782e9f38636781c76498' 
  AND token = 'zWXSwAlAbSy6WXVx48Ghj4EXUKKT0VZGpk2OYNTIdSY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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