Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2737a9fbd05338523d75335376ec17afe0284680db0951f7e1a619235e6b5a70' 
  AND token = 'qW7LH1jTAecvtPfZH6bfN/JaiflHHRcfEaF2WVRwh1s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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