SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1dd88d52b97a0f28932db90f58619aa6843874267eaa8ffc0e261f73fd0100e' 
  AND token = 'f25Zclch5X4q3F+uA+Ahynj7/QtQYsJvHKppJcJXFM4=' 
  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