SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '901b2bb7c5ac68e861c43675bfc0e48143bd44364eab84f069e9acc1caf1ce6e' 
  AND token = 'zZFbExVqjYrkKKhqqinihPxkaYD3rD/FdePPsmKj0S0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

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