SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2aead6cdd8ca14af243be73fee7f63f9d36caa984d576d7ba7ffc89d1c642ee3' 
  AND token = 'YGLXTxPqf4yp6YI7hbxu8H4l0dS1CQdWSHq/EyZO6fs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

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