SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7122232fcc68a72da7d7ef50dd4bd0d81d887ca566b7896491885c8d5378910' 
  AND token = 'aIyByZHufmJGuGzyHzMs/IrzhZAfteXCVyd/cdX4LrA=' 
  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