SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58d1dd65d3ec91925ecd4de26ce2f243209f0c51abd29b3fbd0a3bb6193d0b9e' 
  AND token = '5+ifWzuhNtLWchylgWaZyFOOeNplL47jowVZCO62J3c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

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