SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b7b6076893f08a1854e3575748a809027e1616ca3a3d8276098af0bd894e812' 
  AND token = 'Z/G40LxmQhLN5uz1UYe15iUl9WA4cGQ06x61wzNX8Ns=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

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