Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f9212ccca03e939c089bf61be39cedc5b0f5160baee9449fa26cc616b2a838e' 
  AND token = 'NlB5jb9xAoECNuHDEi9iiKRGluicXHyHyRTE3BdONUk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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