SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4d6fc992a2214be95c14ea915a482d97470fd222aa8f038d55c21cd14fec89dc' 
  AND token = 'OPsFyNCiFxgr605WdvjrjvRnuJvw9K6ONKDVd/pi2jg=' 
  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