SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6abfd8571c18b7244f1fd89ba8226721c32cbaede0396ed9174228c199cee6d2' 
  AND token = 'JY0NYDSZjv+xL5cPehgrlkxi33l1mxrKovJZs9bW+VE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Impossible WHERE noticed after reading const tables