SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06b7295990ee8914e3058a0b00f6b07a92c06e6cce2bebb1882db02861aeeea2' 
  AND token = 'Jz+Wdh82h2mbkEBuF1QNpcYKbJpk+SOe6OrfnYX5R3E=' 
  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