Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27f0e5f52dac9923a051e380cee1769aa27c00b8e53bbf74ebbbb2cc0a51880a' 
  AND token = 'ZBuPadVrigU/oSt4+aGi5bH+0lyrPAKyrU40yFdnREQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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