SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a832c326732f9e10f69d33b05373e5342e961ed6db282f159f5fde000f3779d' 
  AND token = 'FSY4HPySLOI7fj+V+8kR8O4/SkH9QC6/LDDK8VV76NM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

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