SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eea58b49140bd923de0789c392bef79f114fdc9cff4390a424f29cfcbd919708' 
  AND token = 'AMx7cSZKnthItQM5H3goqlmvfIfwt0w8Q40/P+HpAMQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00101

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