SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7354f26143f25eeb76df342ea842b1e12529fe560817c0c10714128526b1a87c' 
  AND token = 'dqiRAcQ/ltXgv1/lEGP2CkjhS+W7TCXtacgZ9BbR+2I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

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