Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8b88154a06b7f0f55ed5aba4b38d08d79fa638956c1a879550f497672f2fd98' 
  AND token = '5WrSJx6m+st0mqG30Nb00XNGeqWccUGviazOXTGnl0M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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