SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9680af0d81ef640885792a0d3753d250e20dd124d118441dd9872f827e6262fc' 
  AND token = 'gBbaqDxr2KxFjdBOS8xgS2NH3x+iA76yljLfuZZpEFA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

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