SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97dce26c908fddda918070274c71179c9e2238922f2b0ed580bcf6eb693c1294' 
  AND token = 'yhOOktQHah8mup+0bsPcuZdd8tLlGUpOo2Y8iqVeVM8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

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