SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d3dd1dea1da4ef7141c13a99b8dca75736794d6df652638d5313720a790016d' 
  AND token = 's0b9QHvCZR16io4gTeu7DoWNH7URdZxWINoIkd1LOtc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

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