SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0b0eb4a243831a8d62823f417d1e7dc16ec3a23747816b4fd07bd65275cf29a' 
  AND token = 'SlUH+IylVPhV2gonsP1rN9QRnmRAJM76aoKrz983mB8=' 
  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