SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61529eef5c385f9df527dbb41a91be14c26269f46ac88e0f1ec9d7d787f25317' 
  AND token = 'HIYx9Cz0HjtQi/P4Z6QPYCb9AT+vqFV4+TLogriDRRs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

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