SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65acaad0d82d2809c053bba9c2e69823fe6f9523fd222d3d9d2c96af848fb139' 
  AND token = 'KcnlX6oSfS1qIdnjeiJWiabDl15wWAD+CHzjw/uAiVs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

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