SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32cc86c35a0f32e237a020ef32fadd0133e91df1ced40043911f632142d443c1' 
  AND token = 'xS6QwV4JudQDIFZrYJx/BJKR9Dow5sTuC6D4Ws9lAZ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

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