SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be95a38d8a4388aa50f7504638d0975be6f084bb1860681532a832d94d139b9c' 
  AND token = 'cLxHSKptWPfsfX7FTV/OqoWNdJyGC9/EwL3VVQsfPIk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

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