SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e06771917347b4203093dd0863c7530a02ecc79ea4a65fae0a7aff01f871b80' 
  AND token = 'EOuEpIOnkWT2yYgD3i6nG/68CxJyaU/CISr8IW/WUtE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

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