SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d701b904d40a0485dc2e10b820d6946e6c3b82921189298b22e0108820b770a' 
  AND token = 'X2jBNR0CfPDGvZHIa1xDM8XjT1fhuWyN5iQi/Q3VZH8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

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