Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7253512bf309a7ff8b2c85e43dca0c28e4bfe9b71d3292dae48f8612e430a12' 
  AND token = '3FpJ40XZqEotC9XX4R4OIzoL+dXlR7fJvLwkitxbzaI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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