SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0aa39ae78a45ca276e1860f3c6b04eac3e29ea6339207f8165e1003c1ce64d6d' 
  AND token = 'C7fAlv896m7pL/oRNJWJeXMgA+75Szycc7WtvXn6SxE=' 
  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