SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e1d2feb8df05c59800c6cdbd55ea85a6cd91bf74fe9d768304a0b82ae99d072' 
  AND token = 'MOBxJdkkQKyQQnBwm6U+wQpFGnG35sMq4GtujT3Aems=' 
  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