Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c07e6aba8592cd4be090151fa7ab722ec6639537771a7c88474a0f72fc06ddde' 
  AND token = '8m+2fqZvZfscHQ1Wom+JBq/F3nhe5mu6I5sM0vaBgAQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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