SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd5367cf14c57d37ff54c48512a81994d1e8fa8d00e11b5995fc403f4f9b4ebe' 
  AND token = 'c3AyRCQdhsuA74S/aOaokkpm3SanMBQFov3Fa5ZckHk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

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