SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b8b315088ea932c7ebed4f3846515b7ce603215dd03484f1d2f4626e57477b5' 
  AND token = 'oa5Dty9AZHsmPpGMK2EQ/wPq6GbhOGiNQYfhE3rLjvs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

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