SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f86e45706dadc8d8d0be0596a0b57e7d5d57e60ef9ee597330f9af59ea51cc2' 
  AND token = '73kO5Kand7zQFvzyWvV6vl/x4F3SoRBfxytnGCdhppg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Impossible WHERE noticed after reading const tables