Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '57449f0dec7649bef061e5f0e91c6f6d0c3055004424dbab4e96df6a4450d64f' 
  AND token = 'zKXw/pn3rRPaX4p0GIeYUBm3wrBdq6RghGbsu6KVG6M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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