SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b523ee93f6a6b8f427c10e2d92abc2e4c427da9ac06ee939f9238b908bd5af2' 
  AND token = 'mq+z81Ah2DrXeRob4jeAiWrBV2A0XD6sf7BGYQE6cq0=' 
  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