SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4bb2366a2b4161c5707116c6098e48eedeecab35e24aa0373888df4e90912797' 
  AND token = 'N6RkhwMdBmxTkhBaeHSo4wIeo57ZQqWgypH6+xwYUrc=' 
  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