SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7dfe5e37dbf459ba822c4844ab8e6ecbc43e5f4e92c8c48de5469ade3d76c106' 
  AND token = 'ToDUl14JnzeONdWLUPGKUtta1jFNk/gjkm8SH3aBYI0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00091

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