Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0935b28c1a6904cd8a358f52da7cd01cbbdcb1585a6621aa8916841c6210ebdb' 
  AND token = 'KgupmHf/mYjXZhDc8C3mF7CnbdytXhD3t5HdyT2MQU0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00061

JSON explain

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